Self-locking insulator.



BEST AVAELABLE COPY No. 801,196. PATENTED OCT. 3, 1905.

G. L. MATHIAS.

SELF LOCKING INSULATOR.

APPLICATION FILED nmza. 1904.

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BEST AVAlLABL E UN ITED STATES PATENT OFFICE.

CHARLES n MATHIAS. or CARLISLE. KENTUCKY, ASSIGSOR OF USE- HALF "ro FRANK KENNEDY, OF CARLISLE, KEXTUGKY.

SELF-LOOKING INSULATOR- Specification of Letters Patent.

Patented 0a. a, 1905.

Lpplkatiel llod Deco-bl! a. 1904- Serial I0. 23.5.2.

To all whom it may (o/wen Be it known that l, CHARLES L. Mxrrrms, a citizen of the United States, residing at Carlisle, in the county of Nicholas and State of Kentucky, have invented new and useful Improvements in Self-Lockin Insulators, of which the followir is a speci cation.

.\lv invention re ates to an improved selflocki insulator, and more particularly to that c as of insulators used on telegraphpoles and general outdoor structures for supporting line-conductor wires.

The main pu of the invention is to provide self-locking means for retaining the ine-wires securely in position on the insulator.

A further purpose of the invention is to provide means to overcome the possibility of the wires slipping from position on the instrlat r; furthermore, sagging thereof.

Further purposes of the invention are to provide means for economically attaching securely line-wires and for detaching the same from the insulator.

Another feature of the invention is to provide an insulator that cart be econotnicallv manufactured, strong, durable, and less liable to become broken, and which will be very efficient in its operation.

with the foregoing and other purposes in view the invention consists of the novel construction'and arrangement of parts hereinl after more specifica v described, and illustrated in the accompanving dra\vings,which form a part oi this speciiication, and wherein I have shown the preferred embodiment of the invention, though it is to be understood that I mav make such changes, variations, and modifications as come properly within the scope of the claims hereunto appended.

Reference being bad to the accorn an ving drawings, forming part of this s i cation, in which similar characters of re erence indicate corresponding parts in all of the figures. Figure 1 is a perspective elevation. Fig. 2'is a sectional view. Fig. 3 is a sectional view on the line 3 3 of Fig. '2.

In the drawings, the numeral 1 represents the head of the insulator. which may be of any desired shape, but which is shown as c lindrieal. Said head is preferablv made of glass. but of c urse may be made 0 anv other suitable nnn-comluctin material. he innal slot 2, in which the wire is held. and a currimunicatin slot-3, arranged at an oblit "0 angle to sui slot 2, so that one end of slot :1 opens into the upper end ofslot 2, whihthe other end of slot 3 opens into the slot 2 lllltl\\' its top. The said slot 2 is sufliciently widt- In accommodate a wire 4 of the ordinary ize and is curved between its opposite ends In the slot 2, is prevented from slipping will or rtiort or escaping front the slot 3. then-h; orming a selflockrng means for the int. The insulator-head l isprovided with :1 stem 7, in this instance integral therewith and of the same non-conducting material. Hm ever, the said stem 7 may be made separate and of any other suitable rnaterial,if desired. said stem 7 having spiral threads 5. the trend of which extends front the outer end of the stem 7 to the base of the head 1, the same being for the purpose of attaching the lltsululurhead 1 to any suitable support. (Not show u.) The corrugations or kinks forming the irregular surfaces 5 and,6 of the slot 2. may extend longitudinally with the slurp. or vertically thereof, though in this instance I have shown the same extending longitudinally with the slot 2.

The insulator-head 1 having been secured to'any suitable support by the engagement of the spiral threads 8 in the support .now to attach the wire to the insulator-head l the oper'utor gras- )s the wire 4. engages the same in the open s ot 3, forcing the wire 4 then-- through until it enters the slot 2, then by pressure applied to the said wire 4 causes th 551111 t ride over the irregular surface 6 onto the bed of the said slot 2 and rest there on, and when the wire 4 is so positioned in the slot 2 the irregular surfaces 5 and 6 pre vent the wire 4 jumping out or being necrdentallv displaced in the said slot 2. For detaching the wire 4 from the insulator the operator polls on the said wire 4, causing the latter to ride over the irregular surface 6 of sulator-hcad 1 is provi ed with a longitudithe slot 2 until the said wire 4 reaches the BEST Avmiixa gcqi j tan oommunioeting slot 3, then withdrew: aid wire the communicating elot3fmmtheinmletor-heed 1. V The stem 7 hu e wrench-receiving portion of some auiteble kind, which isjlluatreted ea eoounteninklo in it: bottom aqua-e in fol"- metion to receive e correspondingly-moped tool tofeeiiitetetbemmingof theatemfrom out of it: eeetin ecroae-erm or other on rtshouldtbeheedbebmken. Yingthue described my invention, what I ddire'to'eilim end secure by Letters Pat- An insuletor includingine head and a threaded 'stem, said head coextensive with aid slot to form communication therewith.

In testimony whereof I hove hereunto set my hand in presence of two sutscribing witso cmms L. m'mms. 

